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20101
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Subject: Horticulture × Author: A.V.D.Dorajee Rao × End date: 2018 × Start date: 2010 ×
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    ThesisItemOpen Access
    Standardization of production technology in garland chrysanthemum (Chrysanthemum coronarium L.)
    (UAS Dharwad, 2010) A.V.D.Dorajee Rao; A.N.Mokashi
    Garland chrysanthemum (Chrysanthemum coronarium L.) is an annual chrysanthemum species, capable of growing throughout the year, though there were seasonal differences in growth, yield and quality parameters. The present investigation was conducted during the years 2008 and 2009 in the Floriculture unit of Main Agricultural Research Station, Department of Horticulture, University of Agricultural Sciences, Dharwad, with the objective of evaluating the effect of nutrition, growth regulators, planting geometry and pinching on growth, yield and quality of garland chrysanthemum. The experiment on the effect of nutrition revealed that flower and seed yield per plant was found to be highest by the application of nitrogen at 150 kg ha-1 + phosphorus at 100 kg ha-1 both during kharif and rabi seasons with a constant dose of potassium at 100 kg ha-1. This combination was superior in terms of maximum gross returns, net returns and benefit – cost ratio. From the study on the effect of planting geometry, it was found that the flower yield as well as seed yield per plot in terms of weight was found to be highest at 30 cm x 30 cm level in both seasons. The number of flowers per plant was increasing as the plants were widely spaced, highest being recorded at 60 cm x 60 cm level. Studies on evaluation of growth regulators/chemicals on this crop showed that there was an increase in the flower yield as well as seed yield per plant by foliar application of gibberellic acid at 100 ppm, cycocel at 3000 ppm, salicylic acid at 100 ppm and paclobutrazol at 40 ppm. Flower quality in terms of average flower weight, flower diameter and vase life, and seed quality in terms of test weight were also at maximum by the pre-harvest application of gibberellic acid at 100 ppm. The effect of pinching time was found to be significant on this crop. The highest yield in terms of number of flowers and weight of seeds per plant was recorded by pinching at 20 days after sowing (nursery) which was on par with those plants pinched at 10 days after transplanting. The experiment on the effect of holding solutions on vase life revealed that sucrose solution of 4% strength plus 1 mM aluminium sulphate could prolong the vase life of garland chrysanthemum to 15 days during rabi.